Thanks to Norbert Vischer, extended the Plot class to make it
relatively simple to draw the x and y values on plots. For examples,
refer to Custom Plot Symbols and Bar Charts in
the Help>Examples>Plots menu.

Thanks to Michael Schmid, added the Dialog.addToSameRow()
macro function, which makes the next item added to a GenericDialog
appear on the same row as the previous item
(example).

Thanks to Salim Kanoun, added the Overlay.selectable(boolean)
method which can be use to make an overlay non-selectable
(example).

Thanks to Salim Kanoun, added the Overlay.setLabelFont(font,true)
method, which causes labels in overlays to scale as the image is zoomed.